Safety effects of maintenance treatments to improve pavement condition on two-lane rural roads — insights for pavement management

Author:

Jafari Anarkooli Alireza1,Nemtsov Iliya2,Persaud Bhagwant1

Affiliation:

1. Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.

2. MTO, West Region, 659 Exeter Rd., London, ON N6E 1L3, Canada.

Abstract

The research used data from two-lane rural roads in Ontario, Canada to evaluate the change in safety following maintenance treatments to improve pavement condition as measured by International Roughness Index (IRI). The state-of-the-art empirical Bayes (EB) before-after methodology was applied to estimate the effects on crashes, separately for arterial and collector roads. The results indicate statistically significant reductions (P < 0.05) in all crashes and property damage only (PDO) crashes of approximately 5% and 7%, respectively, for arterial roads and approximately 11% and 13% for collector roads. For fatal plus injury (FI) crashes, there were small, statistically insignificant changes for the two road types. The results provide interesting, and sometimes counterintuitive insights for those planning maintenance treatments to improve IRI. In sum, the results suggest that consideration should be given to designing and planning pavement maintenance treatments on a site-by-site basis, and, in so doing, to optimize the IRI levels and safety effects that may be accomplished with specific treatments.

Publisher

Canadian Science Publishing

Subject

General Environmental Science,Civil and Structural Engineering

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